Rise in useful resource availability, decreased Levels of competition, and release from enemy stress have all been proposed as explanations.
A UK analyze of meadow flowers that focused on industrial mixes, but which also tested many typical weeds for example ragwort and dandelion, ranked the California poppy hugely in pollen creation, even though it did not deliver a substantial amount of nectar. With a for every-flower foundation it ranked next, by using a charge of eight.3±one.1μl. The corn poppy, Papaver rhoeas, topped the list for for every-flower pollen production with its amount of thirteen.